<template>

    <el-container class="home-container">
      <el-header >

          <div>
              <img src="../assets/heima.png" alt="">
              <span>电商后台管理系统</span>
          </div>
          <el-button type="info" @click="logout">退出</el-button>

      </el-header>
      <el-container>
        <el-aside :width="isCollapse?'64px':'200px'">
            <div class="toggle-button" @click="toggleCollapse">|||</div>
            <el-menu background-color="#333744" text-color="#fff" active-text-color="#409EFF" unique-opened :collapse="isCollapse" :collapse-transition="false" router :default-active="activePath">
<!--                一级菜单-->
                <!--加空字符串是因为index只接收字符串类型，而item.id是整数-->
                <el-submenu :index="item.id+''" v-for="item in menuList" :key="item.id">
<!--                    一级菜单的模板区域-->
                    <template slot="title">
<!--                        图标-->
                        <i :class="iconsObj[item.id]"></i>
<!--                        文本-->
                        <span>{{item.authName}}</span>
                    </template>
<!--                    二级菜单-->
                    <el-menu-item :index="'/'+subitem.path" v-for="subitem in item.children" :key="subitem.id" @click="saveNavState('/'+subitem.path)">
                        <i class="el-icon-menu"></i>{{subitem.authName}}</el-menu-item>
                </el-submenu>

            </el-menu>
        </el-aside>
        <el-main >
            <router-view></router-view>
        </el-main>
      </el-container>
    </el-container>
</template>

<script>
export default {

    data(){
      return{
          menuList:[],
          iconsObj: {
              '125': 'iconfont icon-user',
              '103': 'iconfont icon-tijikongjian',
              '101': 'iconfont icon-shangpin',
              '102': 'iconfont icon-danju',
              '145': 'iconfont icon-baobiao'
          },
          isCollapse:false,
          //被激活的地址
          activePath:''
      }
    },
    created(){
        console.log('生命周期')
        this.getMenuList()
        this.activePath = window.sessionStorage.getItem('activePath')
    },
  methods: {
    logout() {
      window.sessionStorage.clear()
      this.$router.push('/login')
    },

      async getMenuList() {
          const { data: res } = await this.$http.get('menus')
          if (res.meta.status !== 200) return this.$message.error(res.meta.msg)
          this.menuList = res.data
          console.log(res)
      },

  //    点击按钮实现折叠
      toggleCollapse() {
        this.isCollapse = !this.isCollapse
      },
      //保存链接的激活状态
      saveNavState(activePath) {
        window.sessionStorage.setItem('activePath', activePath)
          this.activePath = activePath
      }
  }
}
</script>

<style lang="less" scoped>
  .home-container{
    height: 100%;
    background-color: #a71d5d;
  };
  .el-header{
    background-color: #373d41;
    /*  弹性布局*/
    display: flex;
    justify-content: space-between;

  /*    左边贴边*/
    padding-left: 0;
      /*上下对齐*/
      align-items: center;

      color: #fff;
      font-size:20px ;
      >div{
          display: flex;
          align-items: center;
          >span{
              margin-left: 15px;
          }
      }

  }
  .el-aside{
    background-color: #333744;
      .el-menu{
          border-right: 0;
      }

  }
  .el-main{
    background-color: #eaedf1;
  }
.iconfont{
    margin-right: 10px;
}
.toggle-button{
    background-color: #4A5064;
    font-size: 10px;
    line-height: 30px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>
